Serena Williams

02:06

Serena Williams’ tennis career has led many to label her one of the best women’s tennis players of all time. She made history again in January 2017, setting a new record among both men and women for most Grand Slam singles titles in the Open Era. But one of her lesser-known historic achievements happened off the court, when she and her sister, Venus, became the first African-American women to hold an ownership stake in an NFL franchise as minority owners of the Miami Dolphins.